The Working Cycle and Product Use of Vacuum Filtration

Vacuum filtration is due to the vacuum pressure drawn into the filter drum of the filter to form a pressure difference between the two sides of the filter medium layer (filter cloth). As the filter rotates, the mother liquor in the lye is pumped away, and the heavy base is adsorbed on the filter cloth and finally scraped off by the scraper. Such as 300mL Glass Solvent Filter and 500ml Glass Solvent Filtration Apparatus, Glass Single Vacuum Filtration Assembly, Glass Triple-Branches Lab Vacuum Filtration System, Glass 6-Branch Vacuum Filtration Kit.

The working cycle of the vacuum filter

The working cycle of the vacuum filter can be generally divided into the following stages:
1. cake stage;
2. dehydration stage;
3. washing stage,
4. compaction stage;
5. drying stage;
6. unloading stage.

Among them, the stages of washing, compaction, drying, etc. depending on the actual needs, and the cake, dewatering, and unloading cake are the majority of vacuum filters’ basic working process (the stage of the horizontal belt vacuum filter can be excluded from the unloading stage). In the filtration cycle, the timeshare occupied by each operation varies from filter to filter.

Product Use of Vacuum Filtration

  1. Sample Clarification:
    • Vacuum filtration is commonly used to clarify liquid samples by removing suspended particles or precipitates.
  2. Particle Size Separation:
    • It allows for the separation of particles based on size, where smaller particles pass through the filter paper or membrane, and larger particles are retained.
  3. Sample Concentration:
    • Vacuum filtration can be used to concentrate a sample by collecting the solid residue and reducing the volume of the liquid phase.
  4. Microbial Analysis:
    • In microbiology, vacuum filtration is employed for the collection and analysis of microorganisms from liquid samples.
  5. Environmental Analysis:
    • It is used in environmental testing to filter water samples for the analysis of pollutants and particulate matter.
  6. Pharmaceutical Applications:
    • Vacuum filtration is applied in pharmaceutical laboratories for various purposes, including sample preparation and purification.
  7. Food and Beverage Analysis:
    • In the food industry, vacuum filtration is used for sample preparation and the removal of particulates from liquid samples.
  8. Chemical Synthesis:
    • Vacuum filtration plays a role in chemical synthesis processes, where it is used to isolate and collect solid products.
  9. Quality Control:
    • It is a common technique in quality control laboratories for routine sample preparation and analysis.
  10. DNA or Protein Purification:
    • In molecular biology, vacuum filtration can be used for the purification of DNA or proteins by separating them from impurities.
  11. Pharmaceutical Filtration:
    • Vacuum filtration is crucial in pharmaceutical manufacturing for processes such as the filtration of pharmaceutical intermediates or final products.

It’s important to note that the specific application and use of vacuum filtration may vary depending on the nature of the sample and the analytical requirements of the laboratory or industry. Always follow standard operating procedures and safety guidelines when using vacuum filtration in the laboratory.

Significant Point of Vacuum Filtration

Vacuum filtration provided by Hawach is available for various accessories such as vacuum filtration holders and vacuum pumps. Hawach vacuum filtration holders are made from non-breakable stainless steel for areas where a durable sterilization apparatus is required. This funnel is commonly used in medical and laboratory applications for residue analysis as well as filtration purposes.

Hawach vacuum filtration adopts top-quality raw materials and takes advanced technology as a solid basis, which aims to produce a homogeneous distribution of the residues on the membrane filter surface.

Common Knowledge of Vacuum Filtration

Hawach vacuum filtration is scientific filtration equipment that can be used at high temperatures and high pressure. All of them are superior in quality, high in performance, and are enormously reliable. Hawach supplies various types and sizes to meet the different needs of consumers.

Stainless Steel Three-Branches Vacuum Filtrations
Six-Branches Stainless Steel Vacuum Filtrations
500ml Glass Solvent Filters

The membrane filtration technique is utilized in vacuum filtration to test fluid samples without contamination. The interface connection is tight without risk of leakage, and the fence-like platform effectively prevents fluid overflow and pollute samples. The build-in overflow protection ensures the safety of workman and purity of samples.

Vacuum filtration feature

Vacuum filtration is to cause a certain degree of negative pressure (vacuum) on the side of the filter medium to discharge the filtrate to achieve solid-liquid separation. Therefore, the driving force is small, generally 0.04 to 0.06 MPa, and in some cases, up to 0.08 MPa. It can operate continuously under relatively simple mechanical conditions, and in most cases can obtain a satisfactory working index.

Therefore, compared to other types of filters (such as filter presses), vacuum filters have long been favored by users. Unless the filter press has made major breakthroughs in continuous operation, mechanical properties, manufacturing and operating costs, and meeting the comprehensive requirements of the application department, vacuum filtration will still be top choice in the field of solid-liquid separation.

Vacuum filtration product use:
·Used for filtration of tissue culture fluid, biological fluid, and localization buffer
·Filter cell culture medium and other aqueous solutions
·Sterile filtration of solutions that cannot be autoclaved
·For sterilization filtration and filtration of difficult-to-filter aqueous solutions using glass fiber pre-filtration membranes

Vacuum filtration application:
* Ideal for filtering tissue culture fluids, biological fluids, antibodies, etc.
* Cell culture fluid and other aqueous solutions
* Sterilization filtration of solutions that cannot be autoclaved

There are three forms of vacuum filters: a full filter/storage unit, a top filter, and a receiving bottle. The pore size of the membrane is 0.22 μm and 0.45 μm, with high flow rate and high throughput, low protein binding and so on.